Looks good, I'd change the link to http://www.windowsphone.com/s?appid=57a88f24-7dce-47cb-b322-... which doesn't include region that ends up telling me the app isn't available for my region (en-NZ).

Might just be the screen on my phone (Lumia 920) but the orange seems very flouro compared the screenshots.

Good to see some Windows Phone apps on HN.